package com.ganzalang.gmall.learning.netty.netty.simple;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;

/**
 * @description:
 * @author: Ganzalang
 * @Date 2021/7/19 21:24
 */
public class NettyClient {
    public static void main(String[] args) throws Exception{
        // 客户端需要一个事件循环组
        NioEventLoopGroup group = new NioEventLoopGroup();
        // 创建客户端启动对象
        Bootstrap bootstrap = new Bootstrap();

        try {
            // 设置相关参数
            bootstrap.group(group) //设置线程组
                    .channel(NioSocketChannel.class) // 设置客户端通道的实现类（反射）
                    .handler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel socketChannel) throws Exception {
                            socketChannel.pipeline().addLast(new NettyClientHandler());
                        }
                    });

            // 启动客户端去连接服务器，ChannelFuture是netty的异步模型，sync是非阻塞的
            ChannelFuture channelFuture = bootstrap.connect("127.0.0.1", 6668).sync();
            // 给关闭通道进行监听
            channelFuture.channel().closeFuture().sync();
        } finally {
            group.shutdownGracefully();
        }

    }
}
